Which letter is not used as a symbol of chemical element?

N
O
P
R
N is the chemical symbol of ni­tro­gen, O - oxygen, P - phos­pho­rus.

Answers distribution

N
O
P
R
answers
flagAustralia
0%
0%
0%
100%
10
flagSingapore
0%
0%
10%
90%
10
flagCanada
4%
0%
9%
85%
21
flagIndia
1%
7%
6%
81%
77
flagMalaysia
9%
0%
0%
81%
11
flagPoland
4%
6%
6%
80%
2357
flagUU
0%
9%
9%
80%
21
flagthe United States
5%
6%
7%
79%
165
flagPakistan
0%
8%
16%
75%
12
flagthe United Kingdom
5%
11%
9%
69%
101
flagNorway
7%
15%
7%
69%
13
flagthe Philippines
13%
0%
13%
66%
15
flagGermany
5%
22%
16%
55%
18
flagFinland
50%
10%
10%
30%
10

Gender

men79%
women76%
N
4%
5%
O
7%
9%
P
8%
8%
R
79%
76%

Language versions

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answers
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Which letter is not used as a symbol of chemical element?
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79%

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Illustration: Bri Weldon
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